Warp stop-motion for looms.



J. NORTHROP.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED APR. 11. I914.

1,178,819. 4 Patented Apr. 11,1916.

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JONAS NORTHRQP, (3F HOYEDALE, MASSACHUSETTS, ASSIGNOB, T0 HOPEDALE MANU- FAGT'UREHG COMEANY, 0F HQTEEDALE, MbSSACI-IUSETMQ. A CORPORATION 013 MAS- SACHUSETTS.

To all whom it may concern:

Be it known that 1, Jonas Nonrnnor, a citizen of the United States, residing at in the county of W orcester and State of Massachusetts,

and useful Improvements in; lVarp Stop-Motions for Looms; and 1 do hereby declare the' following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and usethe same.

The present invention relates to an improvement in warp stop motions for looms.

The object of the invention is to reorganize and improve the construction of warp stop motions in order to produce a construction of high efficiency and economical operation.

To these ends the present invention consists'of the warp stop motion hereinafter described and particularly defined in. the claims.

In the accompanying drawings illustrat ing the preferred form of the invention, Figure 1 is an end elevation of loom provided with the present warp stop motion; Fig. 2 is a clan of one end of the feeler rock shaft and associated parts; and Fig. 3

is a plan of a portion of the stop motion illustrating the relative position in pl an of the hunter on the lay and the dagger on the stop motion.

The illustrated embodiment of the inven 'tion is described as follows:-The warp W runs from the warp beam over the whip roll R, thence through the warp detectors to the heddles H, and thence to the breast beam B. The lay L supported on the swords S actuated by the" crank shaft G are all ar ranged as usual in looms. The shipper lever M is of the ordinary construction. These parts are supported by the frame F in the usual manner. The detectors or drop wires 1 are supported on rods in the usual manner, and when a warp thread breaks, the wire supported by the broken thread falls and arrests the weft detector or feeler 2 which is supported on the rock shaft 8. The rock shaft has secured to it the lever 1 which is provided with a hole t'oreceive a pin 5 by which the rock shaft actuating lever 6 is pinned to the arm 4:. A thumb screw 7 is used to hold the pin in place. When it is desired to disconnect the feeler from its actuating lever 6, the thumb screw 7 is Specification of Le ters Eaten/t.

have invented cerfeeler actuating direction to lift the-rear rearward movement Iwnnr $TOF-M-UT1Q'3N roe LOGMS.

Patented. in. 11, rare.

Application filed April 1'7, 1914:. Serial No. 882,482.

loosened the pin hole in. the end of lations of the actuating lever 6 are no longer transmitted to the rock shaft 3. The rock shaft lever t is provided at its extreme end 5 is withdrawn from they the lever 6, and th'e oscil with a counter-balance weight 9. The rear end 10 of the actuating lever 6 is provided with a hole which receives a pin 11 from the casting 12 which is supported 'on the rod 13. Provision for ad; justment of the position of the casting 12 on the feeler actuating rod 13 is secured by means of nuts 1 1 which screw on the rod 13 and hold the casing 12 in adjusted position. A cotter pin 8 holds the pin 11 in the hole in the end of the actuating lever 6.

The lower end of the feeler actuating rod Till 13 ispivotally connected to the cam operated lever 15 which is pivoted on the pin 16 supported in the frame-F of the loom, a cotter pin 17 holding the lever in place. "A coil spring" 20 onthe pin 16 normally tends to turn the cam operated lever end which is attached to the feeler actuating rod 13. This 15'in the tends to hold the lever against the cam 21 mounted on the shaft 22 by which the lever 15 is actuated. This cam engages a' cam block 23 which is. yieldingly supported by the spring 534 and is slidingly mounted on the lever 15. The cam block 23 has a stem 25 which is encircled by the spring 24 and pro,- jects downward through theboss26 on the side of the lever 15. The cam block itself is embraced by the lips 30, as shown in plan in Fig. f

The above described arrangement issu'ch that with each rotation of the shaft QZ'the lever 15 is oscillatedto cause oscillating movements to be imparted toth'e feeler 2, the cam lever 15 pulling downward upon the feeler actuating rod 18 and swinging the feeler to the right, and the spring 2 lifting the rod and moving the. feeler to the left. When the feeler is arrested in its forward movement (to the right," as seen in Fig. 1)- the cam block '23 gives away under the pressure of the cam andperinits the cam to complete its movement without further movement being imparted to the lever 15".- This therefore holds the lever 15in its upper po-- sition. When the feeler is arrested in its (toward the left, as

seen in Fig. 1) under the influence of the 33 being secured thereto by a set screw On its outer end it is provided with a pin 35 which passes through the slot 37 in the front end of the lever 15. The rod 33 is pivotally connected at 36 to the lower end of the knock-off lever 40 pivoted at 41 on the frame of the 100111 and provided with a shipper lever engaging head 1-2 which normally engages the shipper lever ;M resting lightly against it. \Vhen, however, the dagger is held in the path of motion of the hunter 32, the hunter strikes the dagger and causes a pull to be exerted upon. the rod 33 thereby turning the knock-off lever'40 and causing its upper end 42 to knock off the shipper lever M, and so.stop the loom.

A peculiar feature of this stop motion resides in the use of the give-away device or spring supported cam block 23 which yields when the feeler is arrested by engagement with a drop wire so that the feeler operating lever 15 holds the dagger 31 in position to be struck by the hunter on the lay.

Another feature of the construction resides in that by virtue of which the feeler operating lever 15 is operated in one di-' rection by-a cam and in the opposite direction by a spring. This secures simplicity of constructionand certainty of operation. The details of construction of the drop wire support do not form any part of the invention, as-that may be of any suitable form. In the illustrated embodiment the drop wires are supported upon the drop ivire bars 50, in turn carried by the heads-51 which are supported by the rods or brackets 52, in turn carried by the adjustable bracket supports 53, adjustably secured to the frame of the loom. It will be observed thatfin the illustrated embodiment of the invention both edges of the feeder bar are used to engage the. drop wiresthe front edge of i the feeler bar engages a front drop wire,

.32 when arrested in either direction movement.

and the rear edge of the feeler bar engages a rear drop wire, with the result that the feeler bar is arrested in a position whichis substantially the same, whether it happens to be moving in one direction or the other at the'time, so that the feeler operating lever 15 always occupies substantially the same-position, whether it is arrested in its forward or rearward movement, thereby bringing the dagger 31 opposite the banter of The present invention is not limited to the illustrated embodiment, as it may be embodied iirpther forms within the scope of the followiirg claims i 1. A warp stop motion for looms havii'ig, in combination, warp detectors, a feeler, feeler operating means including a feeler operating lever and a rotating cam, thefeeler operating lever being provided with a give-away device mounted thereon constructed to yield when the feeler is arrested in motion in one direction.

2. A warp stop motion for looms having, in combination, warp de ectors, a feeler, alever connected with the feeler for actuating it having a give-away device on it, a cam adapted to engage the give-away dcvice, a spring acting on the lever to move it in a direction opposite to that in which it is moved by the cam, knock-off means, a dagger connected with the knock-off means, a hunter connected with the lay, and connections between the feeler actuating lever and the dagger having provision for mo ing the dagger into the path of motion the hunter when the feeler is arrested by engagement with the "warp detector.

3.. A warp stop motion for looms having, -in combination, warp detectors, a feeler, and feeler actuating means including give-away device and a rotating cam for engaging the give-away device, the give away device being adapted to move rela tively to the feeler actuating means when the latter is arrested upon warp breakage,

4. Awarp stop motion forlooms having, in combination, warp' detectors, a feeler, feeler actuating means, a rotatingcam for operating the feeler actuating means, and means mounted on the feeler actuating means and in engagement with the cam and having a motion relative to the feeler actuating means when the latter is arrested upon warp breakage. v 5. A warp stop motion for loomshaving, in combination, warp detectors, a feeler, rock shaft for the feeler, an arm rigidly mounted on the rock shaft, a lever for actu ating the rock shaft, connections betwe n the lever and the arm, a rod for actu the lever, a second lever for actuating the rod having a give-away device mounted operating the lever, and adapted to be actu ated relatively to the lever by themeans 'operating the lever when the latter is rested upon warp breakage.

7. A warp stop motion for looms having, in combination, warp detectors, a feeler,

rename l &

feeler actuating means including a rock upon and relatively movable to the feeler I shaft, an arm rigidly mounted on the rock act-mating lever adapted to move When said shaft, a lever loosely pivoted on the rock lever, is stopped upon Warp breakage.

- shaft, connections between the lever and the I JONAS NORTHBOP.

5' arm, a feeler actuating lever, connections Witnesses:

between thelevers, a cam for operating the FRANK E. NoRcRoss,- I feeler actuating lever, and means mounted CLARE H. DRAPER. 

